Attachment for sewing-machines.



v vuom. ATTACHMENT FOR SEWING MACHINES.

APPLICATION FILED MAY 22' I918.

Patented May 6, 1919.

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M. YLIOJA. ATTACHMENT FOR SEWING MACHINES. APPLICATION FILED MAY 22,I9IB.

Patented May 6, 1919.

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MATTI YLIOJA, 0F BROOKLYN, NEW YORK.

ATTAcHMENT FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented May 6, 1919.

Application filed May 22, 1918. Serial No. 236,993.

and the invention consists in providingan improved attachment formachines of the class specified which is designed to move the workpieceor workpieces in a predetermined path in the operation of the machineand is particularly designed for use in attaching one workpiece in theform of a strap, tape, string or the like to the edge portion of anotherworkpiece in the form of a garment or other article, and the object ofthe invention is to provide an attachment of the class and for thepurpose specified which is simple in construction and operation andefficient in use.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawings form a part, in which the separate partsof my improvement are desig nated by suitable reference characters ineach of the views, and in which Figure 1 is a plan view of the table-orbase-plate of a sewing machine showing my attachment secured inposition;

Fig. 2 a view similar to Fig. 1 with part of the construction brokenaway and in section, and showing the partsin a different position andindicating the method of using the attachment;

Fig. 3 a partial section on the 3 of Fig. 1; A i

Fig. 4 a partial section on the line 4.-l of Fig. 1;

Fig. 5 apartialsection on the line 5--5 of Fig. 1;

Figs. 6, 7, 8 and 9 are detail views of a part of my improvement showingthe different positions thereof in the several views; and,

Fig. 10 a detail view of one edge portion of a garment, blanket or thelike showing a number of straps secured thereto.

In the drawing I have shownat 11 the table or base-plate of a sewingmachine and at 12 the bobbin and shuttle opening in said table closed bya plate or plates 13, asindicated in Fig. 1 of the drawing, and beneaththe bobbin and shuttle opening isthe usual feed bar 14: with which thefeed clogs are usually connected and, in the practice of my'invention,'said feed dogs are disconnected,

and a part of my improved attachment is connected therewlth ashereinafter set out.

At 15 I have also shown the needle of the 1 machine which is connectedwith theneedle bar in the usualmanner, but the presser foot .usuallyemployed is detached from the machine when -my attachmentis in use.

My attachment comprises a main plate 16 secured to the table or baseplate 11 of the machine by screws 17, and a screw 18, and one endportion of the main plate 16 is provided witha raised portion 19, asclearly shown in Fig. 4:, which extends entirely across said'plate andthrough a side extens1on 20 thereof, and secured to said plate at theopposite sides of the raisedportion 19 and at a predetermined distancetherefrom,

and parallel therewith, are guide bars 21 which form between the sameand the raised portion 19, passages 22 in which are mounted slide rodsor bars 23, the top portions of which are recessed as shown at 24: andmounted in said recesses and movable transverselyof the slide rods 23 isa supplemental movable plate'25 retained against displace .ment intheslide rods by strips 26 secured to theopposite ends of said rods byscrews or similar devices 27 as clearly shown in Figs. 1 and 4 of thedrawing.

The guide bars 21 are connected at one end thereofby a cross plate 28.whichextends longitudinally of the main plate 16, and which retains theslide rods 23 within the passages 22. i

The supplemental movable plate 25 is provided 1 approximately centrallythereof with a rectangular aperture 29, and secured to the upwardlydirected portion 19 approximately centrally thereof is a vertical stud30 on whichis rotatably mounted a cam member 31 to thetop of which issecured a ratchet 32, which when operated as hereinafter describedrotates the cam member within therectangular aperture 29 in the sup-'lever 33 to the short arrn 34: of which is pivoted a link red 35 whichis secured to the top of the feedbar 14 as shown at 36, after the feeddog or dogs have been removed therefrom, and pivoted to the'end of thelonger arm 37 of the lever 33 is a link 38 which is also pivoted toanarm 39, the free end of'which is mounted to rotate on the stud 30 asclearly indicated in Figs. l and .4 of the drawing.

' A spring member 40 is secured to the top of the stud 30 by a screw 41and placed between the spring member 40 and the end of the arm 39 is awasher 42 which bears on the upper end of the stud 30 and pern'iits thefree rotation of the arm 31 on said stud, and the spring member 40 isprovided with a plurality of downwardly directed spring arms 43, threeof which are shown, and which-are adapted to bear on the upper face ofthe ratchet 32-130 give tension thereto and 20 to hold said ratchetagainst free rotation upon the stud'30. Apawl'44j is pivoted to the arm39 a predetermined distance from the free end thereof, and a spring 45is mounted on said arm and adapted to operate in connection with thepawl 44 to hold it in engagement with the ratchet 32 as clearly shown inFig. 1.

Secured tothe front end of the'supplemental movable plate 25 as shown at46 is an approximately T-shaped plate '47, the free end 48 of the crosshead of which is provided with a rectangular aperture 49 ofpredetermined dimensions, and the part 50'of the plate 47 extendsbackwardly and the end thereof is directed upwardl and forms ayoke-shaped keeper51 within which is pivotally mounted a tensionallyoperated member 52, having a hand or finger piece 53 at one end and arectangular head 54 at its opposite'end, which is offset from said handor fingerpiece and which isprovided with a rectangular aperture 55,which is directly over and which corresponds with the aperture 49;. Apin 56 is secured to the backwardly directed extension 50 forwardly ofthe keeper 51 and passes upwardly through an aperture inthe member 52,and is headed 7 at its upper end as shown at 57, and placed between thehead 57 and the member 52 is a spiral spring 58 which normally serves todepress said member, or hold the rectangu- 'lar head 54 thereof inengagement with the free end 48 of the cross head of the T- shapedplate47.

The free end 48 of the'plate 47 and the head 54 of the member 52 aresubstituted for the presser foot of the sewing machine and serve to feedthe workpiece or workpieces in apathto accomplish the desired result.

Heretofore when it was desired to connect a strap, tape or the like,such as shown at 59 in Figs. 2' and 10 of the drawing, with the ed eportionof a garment or article 60 of any ind or class as shown in saidfigures,

the. garment or article 60 as well'as the straps or tapes 59 weremanipulated by hand or constantly turned into four different positionsto secure'said strap or tape 59 to the garment or article 60 bystitchings 61 in a square form as clearly shown in Fig. 10, and muchtime and labor was lost in accomplishing the result in the usual way andfaulty or irregular stitchings were commonly produced by the aforesaidmanner of operation. With my attachment which is secured to the table orbase plate of a machine in such manner as to bring the rectangularapertures 49 and 55 in the parts 48 and 54 in operative relation withthe needle 15 of the machine, and by placing the garment or article 60with a strap or tape 59 between the parts 48 and 54, when said parts arein the position shown in Fig. 1 said garment or article 60 and strap ortape 59 will be firmly held in the desired position, and by operatingthe machine in the usual manner the feed bar 14 will operate the linkrod 35 to oscillate the lever 33, the link 38 and arm 39, whichoperation will rotate the cam member 31 by reason of the engagement ofthe pawl 44 with the ratchet 32.

In the operation of the machine, assuming the parts 47- and 52, and theparts connected therewith, are in the position shown in full lines inFig. 1, said parts are moved into the position indicated in dotted linesin said figure thus producing the line of stitching as indicated at 62in Fig. 2, after which said parts move from the position shown in dottedlines in Fig. 1 to the full line position shown in Fig. 2, forming theline ofstitching indicated at (33, afterwhich the said parts move mentor article 60 with the strap or tape 59 secured thereto by thestitchings as above described are removed from the parts 48 and 54 bydepressing the hand or finger piece 53 and another strap or tape 59 isplaced on the garment or article 60 and between the parts 48 and 54, andthe above operation is repeated. In the manner of attaching the strapsor tapes 59 to a. garn'lent or article 60, as above described, after astrap or tape has been placed in position, there is no time lost inattaching the same to a garment or article 60 and if properly placed inposition the attachment thereof to the garment will be uniform and neatin appearance.

' The parts 47 and 52 are moved in the manner above set out by the sliderods 23 and the supplemental movable plate 25 which constitute two framemembers movable at right angles to each other and in the slide or guideways, and the movement thereof is controlled by the cam member 31 whichoperates in the rectangular aperture 29 in the movable plate 25, and theform and dimensions of the stitches 61 will be controlled by thedimensions of the cam member 31 and aperture 29, as will be readilyunderstood, and in Figs. 6 to 9 inclusive, I have shown the positionsthe cam member 31 assumes during a complete revolution thereof, and fromthe foregoing description theoperation will be readily understood by allthose skilled in the use of apparatus of this class when taken inconnection with the accompanyin drawing.

While I have shown an attachment for sewin machines which is designed toguide a wor piece or workpieces through a path to form on such workpieceor workpieces an approximate rectangular or square form of stitching, itwill be understood that my invention is not limited to the Specific formof the stitching as various shapes may be employed, and all that isnecessary to vary the shapes of the stitching would be to change theform of the aperture 29 as well as the cam member 31, as well as theapertures 49 and 55, and while I have shown certain details ofconstruction for carrying my invention into effect, it will beunderstood that I am not limited to such details, and changes in andmodifications of the construction herein shown and described may bemade, within the scope of the appended claims, without departing fromthe spirit of my invention or sacrificing its advantages.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. ln an attachment for sewing machines, a support, a lever pivoted tosaid support, means adapted to be connected with the feed bar of themachine for giving said lever an intermittent oscillatory movement, twomembers mounted in said support and adapted to move at right angles toeach other, one of said members being provided with an angular aperture,a cam mounted to operate in said aperture, means in operative connectionwith said lever for rotating said cam to give said members theirmovements, and

means involving a tensionally operated device connected with one of saidmembers for supporting a workpiece.

2. In an attachment for sewing machines, a support, a lever pivoted tosaid support, means adapted tobe connected with the feed bar of themachine for giving said lever an intermittent oscillatory movement, twomembers mounted in said support and adapted to move at right angles toeach other, one of said members being provided with an angular aperture,a cam mounted to operate in said aperture, said cam being provided atone side thereof with a ratchet, a tensionally operated pawl mounted atone side of said ratchet and in operative connection therewith, means inoperative connection bers mounted in said support and adapted to move atright angles to each other, one of: said members being provided with anangular aperture, a stud secured to said support and adapted to passvertically through said members and through said aperture, a cam mountedon said stud and adapted to operate in said aperture, a ratchet devicesecured to one face of the cam, link devices pivoted to the topof saidstud and to one end of said lever, a tensionally operated pawl pivotedto one of said link devices and adapted to cooperate with said ratchetto rotate the same and said cam to give said members their movements andworkpiece supporting devices connected with one of said members.

In testimony that I claim the foregoing as my invention 1 have signed myname, in presence of the subscribing witnesses, this 20th day of May,1918.

MATTI YLIOJA. Witnesses:

(l. E. MULREANY, H. E. THOMPSON.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G."

